Reference Book
Delivery chain:-is a belt or chain the delivery system of a press uses to transfer
the printed sheet from the impression cylinder to the delivery pile.
Delivery grippers:- These are small metal fingers attached to a bar extended
between two continuous delivery chains.
Delivery table:- is a platform or tray on which the printed sheets are stacked.
Delivery cylinder:-It is a cylinder in the delivery unit of a press that transfers
the printed sheet from impression cylinder to the delivery pile. This cylinder
is usually covered with skeleton wheels.
Skeleton wheels:-It is an adjustable disc on the delivery cylinder that holds the
sheet as it travels.
Joggers:-Jogging side and back guides are used to control the outfeed pile.
Two stationary guides can be adjusted to the paper extremes. The jogging
guides are adjusted to touch the remaining two paper sides on their innermost
stroke. The delivery pile is continually touched by all four guides. This keeps
the stack straight.Four units of an Offset Machine
Ancilliary units
Anti-setoff spray:The printed sheets in the delivery unit are sprayed with anti-
setoff powder to avoid setoff. This powder layer is distributed by compressed
air, thereby preventing the ink of the freshly printed sheets from getting too
close to the reverse side of the top sheet. Anti-setoff powder are colourless